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Old 01-17-2008, 10:10 AM   #1
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Default Coil Pack Keeps Going Bad

I have had a coil pack "go bad" three times within 4 months and 6,000 miles, on my 2004 A4 1.8T. This started happening right after the 35,000 mile service (which included a tune up). The dealer just shrugs it off ("These things happen."). I'm wondering if this might be a sign of a more serious problem with the engine (which the dealer might be trying to ignore, while the car is still under warranty). I would appreciate any advice.
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Old 01-17-2008, 10:17 AM   #2
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Default Did they replace the spark plugs during the service?

If so maybe they are misgapped. Spark plug issues can cause misfires like a bad coil. I doubt it's a coincidence that this problem didn't exist before they touched the car.
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Old 01-17-2008, 10:21 AM   #3
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Default Re: Did they replace the spark plugs during the service?

yes, got new spark plugs with 35K service
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Old 01-17-2008, 12:17 PM   #4
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Default ...

I would replace the spark plug in the problem cylinder and also inspect the coil pack wiring harness.

Also I would consider different dealer if that is an option.
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Old 01-20-2008, 01:29 PM   #5
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Default valve cover gasket may be leaking

valve cover gasket may be leaking
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Old 01-21-2008, 07:02 PM   #6
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Default Re: Did they replace the spark plugs during the service?

the audi plugs come gapped. you don't need to gap them. It's possily that the insulation on the plug is cracked. try swapping the plug to another cylinder and see if the problem follows the plug. On the other hand, coils going out is a very very common problem and in no way indicates any other damage or issues.
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Old 01-22-2008, 10:32 AM   #7
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Default Can you please elaborate?

How would this cause coil pack failure?

Thanks...
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Old 08-18-2008, 05:13 PM   #8
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Default Re: Did they replace the spark plugs during the service?

I'm adding to an old thread, but I just finished replacing a coil pack on my 02 A4-1.8T.
Engine lost power and limped along, threw a flashing CEL.
I hooked up the VAG COM and found a code for misfire on cylinder 1. I swapped the coil packs on cylinders 1 and 2 and restarted it. Now I got a misfire code from cylinder 2. Just to be sure, I swapped the coil packs on 2 and 3. Restarted and got the misfire code on cylinder 3.

Luckily carousel audi has a parts dept that is open til 9pm. Picked up two coil packs ($38 each) and replaced the bad one on cylinder 3.

Started up and drove home with no problems.

BUT....

I just changed the plugs yesterday and I wonder if there is any way that the plug service could have caused the coil to go bad. I did not change the gap (stock NGK's but not from dealer).

By the way, all four coil packs were Rev. J. The new ones from the dealer are Rev. R.
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Old 08-18-2008, 05:13 PM
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18t, 2004, 30, a3, a4, audi, bad, coil, coilpacks, cyclinder, cylinder, installing, pack, packs, plugs, spark


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